Diodes Incorporated PI5PD2051BTAEX

Overview

PI5PD2051BTAEX from Pericom Semiconductor is a 70mΩ high-side N-channel MOSFET power-distribution switch with active-high enable, 0.5A continuous current rating, 1.0A typical current limit, and thermal/short-circuit protection - designed for USB bus- and self-powered hub applications requiring precise overcurrent reporting and reverse-current blocking.

For engineers reviewing the PI5PD2051BTAEX datasheet, PI5PD2051BTAEX pinout, PI5PD2051BTAEX application, or PI5PD2051BTAEX equivalent, key selection criteria include its SOT23-5 package, 2.7V–5.5V operating range, 0.6ms typical rise time, 1μA standby supply current, and /OC open-drain fault reporting with 4–15ms deglitch timing.

Technical Context

The PI5PD2051B implements an integrated charge-pump gate driver to fully enhance the internal N-channel MOSFET at input voltages as low as 2.7V, enabling stable 70mΩ R_DS(on) across its full operating range. Its active-high EN pin directly interfaces with standard CMOS logic without level-shifting.

Thermal shutdown activates at ~135°C junction temperature with ~10°C hysteresis, causing automatic cycling until fault removal; simultaneous overcurrent detection triggers /OC assertion after a deglitched 4–15ms delay, while UVLO disables the switch below ~2.0V input with 75mV hysteresis.

Key Specifications

Pinout & Package

SOT23-5 (lead-free, green) package with exposed pad for thermal enhancement; 5-pin surface-mount footprint compatible with automated assembly and IPC-7351B standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current-limited power switch applications.

Compared with TUSB2036IPWR and TPS2051BDBVR, PI5PD2051BTAEX offers optimal balance of USB-compliant 1.0A trip accuracy, active-high enable simplicity, and standalone fault reporting - making it ideal for discrete power-switching roles in USB host, hub, and peripheral designs where control flexibility and compliance are prioritized.

Availability

PI5PD2051BTAEX is available at Aetrix Electronics and suitable for USB self-powered hubs, laptop docking stations, set-top box peripheral ports, and battery-powered portable equipment requiring stable component supply and long-term lifecycle support.

Supply support for PI5PD2051BTAEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-speed interface, timing, and power-management ICs for computing, communications, and consumer electronics before acquisition in 2016.

The PI5PD20xx series was engineered specifically for USB-compliant power distribution - delivering integrated protection, precise current limiting, and compact packaging for space-constrained host and peripheral applications.

FAQ

What is the maximum continuous output current supported by PI5PD2051BTAEX?

The PI5PD2051BTAEX supports 0.5A continuous output current across its full operating temperature range (-40°C to +85°C ambient). This rating is validated with 70mΩ R_DS(on) at 5V input and accounts for thermal derating up to +125°C junction temperature. Exceeding 0.5A continuously risks thermal shutdown activation.

Does PI5PD2051BTAEX provide reverse current blocking, and how is it implemented?

Yes - PI5PD2051BTAEX blocks reverse current flow from OUT to IN when disabled, using its internal N-channel MOSFET configured in high-side topology with body-diode orientation reversed by charge-pump biasing. This eliminates need for external back-to-back FETs or diodes in USB power-isolation applications.

How does the /OC pin behave during overtemperature versus overcurrent events?

During overtemperature shutdown, /OC asserts immediately upon reaching ~135°C junction temperature. During overcurrent, /OC asserts only after a deglitched 4–15ms delay to reject transients. In both cases, /OC remains low until the fault clears and device recovers - requiring an external pull-up resistor (e.g., 100kΩ) for proper logic-level signaling.

Can PI5PD2051BTAEX operate reliably at 2.7V input, and what performance changes occur?

Yes - PI5PD2051BTAEX operates down to 2.7V input thanks to its integrated charge pump. At 2.7V, R_DS(on) increases to 75–150mΩ (vs. 70mΩ at 5V), resulting in higher conduction loss; rise time improves to 0.4ms, and current limit shifts slightly lower (0.7–1.3A). All protections remain fully functional across the range.